I just bought a portable CD player whose specs call for a 4.5V/300mA power adapter. The player doesn't come with an adapter, just two AA batteries. I found a couple of adapters in my house that are 6V/300mA. Can I (safely) use these adapters in place of the 4.5V the specs call for?
Gary
use
I think you would be playing with fire. Apparently, the unit actually requires 3v DC (as evidenced by inclusion of the 2 AA batteries). Using a 6v supply (assuming that the voltage doesn't drop under load - which may or not be a valid assumption) would be overating the player by 100%...not a good idea, at least if you want it to last.
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I agree.
4.5v appears to be one of the standard items at RadioShack and you can select the proper connector and leave the store with a complete solution for likely
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Gary,
Something does not fit. Two AA batteries account for 3V max. Most of the time it will be less. For 4.5V you would need three batteries. So if your battery box only has place for two batteries - and the CD player works fine with it - 6V will be a substantial overkill. It may even worse when the converter is unregulated. If you have a regulated 6V converter you can nevertheless use it but you have to use three diodes - let's say 1N400x - in series. If you have an unregulated supply, you have to add a regulator circuit. A new converter will be much easier and even cheaper.
petrua
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It does seem strange, but my CD player uses 2 AAs and it is marked 4.5 volts on the DC input and, in fact, came with a 4.5v wall wart. My digital camera uses a 3.7 Li-ion battery and comes with a 5v AC adapter.
These devices have an internal power supply that converts to several voltages as a computer's PSU for the various electronics inside. While the OP's CD player may work with the 6volt adapter, the dissipation may be excessive and damage the player. John
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Which is why he posted in the first place.
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